In GPS module, the GPS receiver decodes the NMEA data strings from the satellites and output to software interface for the discussion of current position, speed, direction, time, etc.

In GSM / GPRS module, the usage of AT commands is introduced. Students can use software interface to send AT command to control GSM/GPRS module, send SMS message and make a phone call through headset interface, or access to the Internet.

When integrating both GPS and GSM / GPRS modules, the latitude and longitude data received by GPS module, this reference data will be sent to internet by GPRS service and report in Google Map Website.

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